Fight Club actor Edward Norton has welcomed his first child, according to reports.

Although there has been no official confirmation from the actor, US Weekly are reporting that 43-year-old Norton and his fiancée Shauna Roberston welcomed a baby boy in March.

The couple, who got engaged in 2011 after a six-year courtship, have kept mum about the pregnancy - keeping it a secret until just last month.

Although there are few details about the baby's birth, an insider said the pair are "thrilled and excited for parenthood."